132 lines
5.9 KiB
PHP
132 lines
5.9 KiB
PHP
<?php
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declare(strict_types=1);
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/*
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* This file is part of the TYPO3 CMS project.
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*
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* It is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, either version 2
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* of the License, or any later version.
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*
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* For the full copyright and license information, please read the
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* LICENSE.txt file that was distributed with this source code.
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*
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* The TYPO3 project - inspiring people to share!
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*/
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namespace TYPO3\CMS\Frontend\Middleware;
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use Psr\Http\Message\ResponseInterface;
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use Psr\Http\Message\ServerRequestInterface;
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use Psr\Http\Server\RequestHandlerInterface;
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use TYPO3\CMS\Core\Authentication\BackendUserAuthentication;
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use TYPO3\CMS\Core\Authentication\Mfa\MfaRequiredException;
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use TYPO3\CMS\Core\Context\Context;
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use TYPO3\CMS\Core\Http\NormalizedParams;
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use TYPO3\CMS\Core\Localization\LanguageServiceFactory;
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use TYPO3\CMS\Core\Utility\GeneralUtility;
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use TYPO3\CMS\Frontend\Authentication\FrontendBackendUserAuthentication;
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use TYPO3\CMS\Frontend\Cache\CacheInstruction;
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/**
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* This middleware authenticates a Backend User (be_user) (pre)-viewing a frontend page.
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*
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* This middleware also ensures that $GLOBALS['LANG'] is available, however it is possible that
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* a different middleware later-on might unset the BE_USER as he/she is not allowed to preview a certain
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* page due to rights management. As this can only happen once the page ID is resolved, this will happen
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* after the routing middleware.
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*/
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class BackendUserAuthenticator extends \TYPO3\CMS\Core\Middleware\BackendUserAuthenticator
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{
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public function __construct(
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Context $context,
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protected readonly LanguageServiceFactory $languageServiceFactory
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) {
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parent::__construct($context);
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}
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/**
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* Creates a backend user authentication object, tries to authenticate a user
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*/
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public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
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{
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// Initializing a possible logged-in Backend User
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// If the backend cookie is set,
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// we proceed and check if a backend user is logged in.
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$backendUserObject = null;
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if (isset($request->getCookieParams()[BackendUserAuthentication::getCookieName()])) {
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$backendUserObject = $this->initializeBackendUser($request);
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}
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$GLOBALS['BE_USER'] = $backendUserObject;
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// Load specific dependencies which are necessary for a valid Backend User
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// like $GLOBALS['LANG'] for labels in the language of the BE User (so AdminPanel works)
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if ($backendUserObject !== null) {
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$GLOBALS['LANG'] = $this->languageServiceFactory->createFromUserPreferences($GLOBALS['BE_USER']);
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$this->setBackendUserAspect($GLOBALS['BE_USER']);
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if ($this->context->getPropertyFromAspect('backend.user', 'isLoggedIn', false)
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&& (strtolower($request->getServerParams()['HTTP_CACHE_CONTROL'] ?? '') === 'no-cache'
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|| strtolower($request->getServerParams()['HTTP_PRAGMA'] ?? '') === 'no-cache')
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) {
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// Detecting if shift-reload has been clicked to disable caching if so.
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// This is only done if a backend user is logged in to prevent DoS-attacks for "casual" requests.
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$cacheInstruction = $request->getAttribute('frontend.cache.instruction', new CacheInstruction());
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$cacheInstruction->disableCache('EXT:frontend: Logged in backend user forced reload disabled cache.');
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$request = $request->withAttribute('frontend.cache.instruction', $cacheInstruction);
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}
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}
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$response = $handler->handle($request);
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// If, when building the response, the user is still available, then ensure that the headers are sent properly
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if ($this->context->getAspect('backend.user')->isLoggedIn()) {
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return $this->applyHeadersToResponse($response);
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}
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return $response;
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}
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/**
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* Creates the backend user object and returns it if a valid backend user is found.
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*/
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protected function initializeBackendUser(ServerRequestInterface $request): ?FrontendBackendUserAuthentication
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{
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// New backend user object
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$backendUserObject = GeneralUtility::makeInstance(FrontendBackendUserAuthentication::class);
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try {
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$backendUserObject->start($request);
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} catch (MfaRequiredException $e) {
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// Do nothing, as the user is not fully authenticated - has not
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// passed required multi-factor authentication - via the backend.
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return null;
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}
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if (!empty($backendUserObject->user['uid'])) {
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$this->setBackendUserAspect($backendUserObject, (int)$backendUserObject->user['workspace_id']);
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$backendUserObject->fetchGroupData();
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}
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// Unset the user initialization if any setting / restriction applies
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if (!$this->isAuthenticated($backendUserObject, $request, $request->getAttribute('normalizedParams'))) {
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$backendUserObject = null;
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$this->setBackendUserAspect(null);
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}
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return $backendUserObject;
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}
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/**
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* Implementing the access checks that the TYPO3 CMS bootstrap script does before a user is ever logged in.
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* Returns TRUE if access is OK
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*/
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protected function isAuthenticated(FrontendBackendUserAuthentication $user, ServerRequestInterface $request, NormalizedParams $normalizedParams): bool
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{
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// Check IP
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$ipMask = trim($GLOBALS['TYPO3_CONF_VARS']['BE']['IPmaskList'] ?? '');
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if ($ipMask && !GeneralUtility::cmpIP($normalizedParams->getRemoteAddress(), $ipMask)) {
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return false;
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}
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// Check SSL (https)
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if ($GLOBALS['TYPO3_CONF_VARS']['BE']['lockSSL'] && !$normalizedParams->isHttps()) {
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return false;
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}
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return $user->backendCheckLogin($request);
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}
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}
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